Arq is the only online backup product built for the Mac and only the Mac. So it has the look and feel you expect from a Mac application. Arq backs up and faithfully restores all the special metadata of Mac files that other products don't, including resource forks, ACLs, and creator codes. Arq works like Time Machine, except you don't have to remember to plug in your external hard drive. Following the initial backup, Arq automatically makes incremental backups every hour, every d ay, uploading just the files that have changed since your last backup. Arq keeps hourly backups for the past 24 hours, daily backups for the past month, and weekly backups for everything older than a month. Arq lets you set a budget for S3 storage, and it automatically drops the oldest backups to keep within the budget. Arq backs up everything with no limits. It backs up files of any size, external drives, and network drives. Arq "de-duplicates" your backups, never storing the same file twice in your S3 account.

What is new in this release:

Added error logging for the case where SFTP init fails.

Reduced the number of API calls when backing up to Dropbox.

Fixed an issue where data validation for Dropbox mistakenly thinks no objects exist at Dropbox.

Removed the check for free space on SFTP server because most SFTP servers don't support the API call.

What is new in version 4.7.5:

Added an "Enter License Code" function for use with a new license scheme.

What is new in version 4.7.3:

Could not find a workaround for memory leaks in Apple's Xcode 6, so reverted to Xcode 5 and previous, working code.

What is new in version 4.7.2:

Changed to NSURLSession networking library (for OS X 10.9 and above) to work around a memory leak that occurred at random times during backup.

What is new in version 4.7:

Added support for new AWS Frankfurt region.

Added a button to delete all Arq-created data from your Google Drive account.

Switched to AWS Signature Version 4 for signing AWS requests.

Changed the default to not use the hidden "appdata" folder when adding a Google Drive account because it was causing too much confusion. While it's nice to store data in the "appdata" folder so that it doesn't clutter your Google Drive activity view, it's difficult to see or delete that data when you need to.